[ 31.547419] BUG: Bad rss-counter state mm:00000000ae433913 type:MM_FILEPAGES val:33 [ 31.548412] BUG: Bad rss-counter state mm:00000000ae433913 type:MM_ANONPAGES val:22 [ 31.708168] ================================================================== [ 31.709045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.709933] Read of size 8 at addr ffff88800e2b14e0 by task sshd/225 [ 31.710649] [ 31.710917] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.711731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.712652] Call Trace: [ 31.712951] [ 31.713234] dump_stack_lvl+0x91/0xf0 [ 31.713698] print_report+0xcc/0x620 [ 31.714149] ? __virt_addr_valid+0x102/0x340 [ 31.714663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.715239] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.715830] kasan_report+0xbe/0xf0 [ 31.716281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716861] vma_interval_tree_remove+0xc75/0xec0 [ 31.717430] vma_prepare+0xc54/0x11a0 [ 31.717883] __split_vma+0x5af/0x950 [ 31.718321] ? __pfx___split_vma+0x10/0x10 [ 31.718814] ? find_held_lock+0x2c/0x110 [ 31.719305] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.719862] ? lock_is_held_type+0x9f/0x120 [ 31.720366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.720932] ? mtree_range_walk+0x632/0x900 [ 31.721450] ? mas_walk+0x5c7/0x7c0 [ 31.721891] do_vmi_munmap+0x1f1/0x2b0 [ 31.722355] mmap_region+0x1f9/0x2660 [ 31.722812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.723298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.723975] ? __pfx_lock_acquire+0x10/0x10 [ 31.724481] ? __pfx_mmap_region+0x10/0x10 [ 31.724979] ? security_mmap_addr+0x7d/0xa0 [ 31.725473] ? get_unmapped_area+0x1f5/0x3f0 [ 31.725990] do_mmap+0x854/0xf00 [ 31.726400] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.726864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.727415] ksys_mmap_pgoff+0x3af/0x500 [ 31.727895] do_syscall_64+0x3f/0x90 [ 31.728347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.728950] RIP: 0033:0x7fd22a0e5d82 [ 31.729387] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.731396] RSP: 002b:00007ffca0a97e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.732253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd22a0e5d82 [ 31.733038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd22951f000 [ 31.733822] RBP: 00007fd22951f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.734612] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4301f2ec0 [ 31.735408] R13: 00007ffca0a97e80 R14: 00007ffca0a97eb0 R15: 00007ffca0a98210 [ 31.736213] [ 31.736482] [ 31.736682] Allocated by task 212: [ 31.737082] kasan_save_stack+0x22/0x50 [ 31.737549] kasan_set_track+0x25/0x30 [ 31.738017] __kasan_slab_alloc+0x59/0x70 [ 31.738503] kmem_cache_alloc+0x16b/0x370 [ 31.738991] vm_area_dup+0x20/0x160 [ 31.739434] __split_vma+0x170/0x950 [ 31.739865] split_vma+0xc6/0x110 [ 31.740279] mprotect_fixup+0x8d2/0xb30 [ 31.740750] do_mprotect_pkey+0x87e/0xd40 [ 31.741236] __x64_sys_mprotect+0x78/0xc0 [ 31.741731] do_syscall_64+0x3f/0x90 [ 31.742178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.742774] [ 31.742975] Freed by task 204: [ 31.743342] kasan_save_stack+0x22/0x50 [ 31.743820] kasan_set_track+0x25/0x30 [ 31.744286] kasan_save_free_info+0x2b/0x50 [ 31.744793] __kasan_slab_free+0x10a/0x190 [ 31.745288] kmem_cache_free+0x10d/0x4d0 [ 31.745766] rcu_core+0x8c8/0x2860 [ 31.746190] __do_softirq+0x1b7/0x7d4 [ 31.746639] [ 31.746838] Last potentially related work creation: [ 31.747400] kasan_save_stack+0x22/0x50 [ 31.747871] __kasan_record_aux_stack+0x8e/0xa0 [ 31.748406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.749008] remove_vma+0x139/0x170 [ 31.749428] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.749948] do_vmi_munmap+0x1f1/0x2b0 [ 31.750395] __vm_munmap+0x138/0x3a0 [ 31.750829] __x64_sys_munmap+0x59/0x80 [ 31.751301] do_syscall_64+0x3f/0x90 [ 31.751750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.752346] [ 31.752545] The buggy address belongs to the object at ffff88800e2b1488 [ 31.752545] which belongs to the cache vm_area_struct of size 168 [ 31.753924] The buggy address is located 88 bytes inside of [ 31.753924] freed 168-byte region [ffff88800e2b1488, ffff88800e2b1530) [ 31.755222] [ 31.755437] The buggy address belongs to the physical page: [ 31.756055] page:0000000091e49485 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2b1 [ 31.757056] memcg:ffff888009ac1601 [ 31.757454] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.758046] page_type: 0xffffffff() [ 31.758463] raw: 0100000000000200 ffff88800879fc80 ffffea0000385a00 0000000000000004 [ 31.759314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ac1601 [ 31.760161] page dumped because: kasan: bad access detected [ 31.760779] [ 31.760984] Memory state around the buggy address: [ 31.761520] ffff88800e2b1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.762307] ffff88800e2b1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.763104] >ffff88800e2b1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.763891] ^ [ 31.764587] ffff88800e2b1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.765374] ffff88800e2b1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.766158] ================================================================== [ 31.767056] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.644189] BUG: Bad rss-counter state mm:00000000b408afa8 type:MM_FILEPAGES val:33 [ 33.645185] BUG: Bad rss-counter state mm:00000000b408afa8 type:MM_ANONPAGES val:22 [ 34.148002] BUG: Bad rss-counter state mm:0000000065d0b73b type:MM_FILEPAGES val:33 [ 34.149139] BUG: Bad rss-counter state mm:0000000065d0b73b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19597' (ECDSA) to the list of known hosts. 2023/06/20 03:01:00 fuzzer started 2023/06/20 03:01:01 dialing manager at localhost:44161 2023/06/20 03:01:01 checking machine... 2023/06/20 03:01:01 checking revisions... [ 34.873888] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:01:01 testing simple program... [ 34.915312] cgroup: Unknown subsys name 'net' [ 34.954558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:01:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd1651e9c8 CR3=0000000014688000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030303a31303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a31303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880192fbd10 RCX=0000000000000100 RDX=1ffff1100325f789 RSI=ffffffff818c7463 RDI=ffff8880160f5380 RBP=ffff8880160f5380 RSP=ffff88806cf09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff8880192fbd10 RIP=ffffffff816cba03 RFL=00000283 [--S---C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fccc9f58900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fccca50f618 CR3=0000000019d74000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000